* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/* 去除斜体 */
em,
i {
    font-style: normal;
}
/* 去掉小圆点 */
li {
    list-style: none;
}
/* 取消图片低侧有空白缝隙的问题 */
img {
    border: 0;
    vertical-align: middle;
}
/* 鼠标经过按钮强制变为小手 */
button {
    cursor: pointer;
}
/* 去除链接下划线 */
a {
    color: #666;
    text-decoration: none;
}
/* 清除浮动 */
.clerfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    height: 0;
}
.clearfix {
    *zoom:1;
}
button,
input {
    border: 0;
    outline: none;
}